Fadilla, R. N., and A. Pradiptiya. “Analisis Daya Dukung Pondasi Spun Pile Dievaluasi Dengan Kalendering Dan PDA”. Journal of Applied Civil Engineering and Infrastructure Technology, Vol. 3, no. 2, Dec. 2022, pp. 18-25, doi:10.52158/jaceit.v3i2.394.